more html operations

library/i18nsupport.js

@@ -93,7 +93,7 @@ class I18nSupport {
    * @returns {string} Formatted message
    */
   formatMessagePlural(languages, messageId, count, parameters = []) {
-    this._formatMessagePluralFromBundle(this.bundles, languages, messageId, count, parameters);
+    return this._formatMessagePluralFromBundle(this.bundles, languages, messageId, count, parameters);
   }
 
   /**

tx/README.md

@@ -4,7 +4,7 @@ The TX module provides FHIR terminology services for CodeSystem, ValueSet, and C
 
 ## Todo
 
-* More work on the HTML interface (external code systems, global functions) 
+* More work on the HTML interface (external code systems, global functions, render capability statements) 
 * add more tests for the code system providers - filters, extended lookup, designations and languages 
 * more refactoring in validate.js and expand.js 
 * full batch support 

tx/cs/cs-api.js

@@ -767,9 +767,14 @@ class CodeSystemFactoryProvider {
     throw new Error("Must override");
   }
 
-  codeLink() {
+  codeLink(code) {
     return undefined;
   }
+
+  iteratable() {
+    return false;
+  }
+
 }
 
 module.exports = {

tx/cs/cs-usstates.js

@@ -292,6 +292,10 @@ class USStateFactoryProvider extends CodeSystemFactoryProvider {
   id() {
     return "us-states";
   }
+
+  iteratable() {
+    return true;
+  }
 }
 
 module.exports = {